Tool retainer



Nov. 24, 1931. 'M. c. HUFFMAN 198339361 TOOL RETAINER Filed June 26$ 1930 MA-Mm- HTT'K UNITEDYSTATES mnnviiv oHnsrEn, HUFFMAN, oFoLAREMOivh-T margarita; ssmiionjgrc Patented Nov. 24, 1 931 SULLIVAN MACHINERY coMrAN A COBJBQBATIQZNIIQE irAssAq rnsE'rrs r I Q r drool-Bragging j f i Application filed June 26;

This inventionrelates to tool retainers end more particularly but notexclusively to im-( proved tool retainers forrook drills or similar hammer tools. 1

An object of this invention is to provide an improved tool retainer. Another object is to provide an improved retainer for the working implement of a hammer rock drill 0r similar tools. Anotherobject is to-provide an improved means for holding the retaining element in its operative'position and in its inoperative -position. 'A further object "is V to provide-an improved retainer for the working implement-0t a rock drill or similar hammer tool wherein improved "resilient means isprovided'formounting the retaining element in a novel manner on the drill. Yet another object'isto provide 'animproved tool retainer of a rugged and simple design well adapted to withstand hard usage and which can be readily-assembled and disassembled. These andfother objects and advantages of thi's inventionwill-however here-j inaftermorefully appeanf I In the accompanying drawings there is shown for purposes ofillustration one form which the invention may; assume in practice.

In these drawings 1 Fig. '1 is an elevational view of theforward portion of a hammer ,"rock drill with which the illustrative form of the improved tool re taining means is associated;" 1 I 'Fig. 2 is'acentral longitudinally extending sectional vie'w taken substantially. on, line 22of-Fig.1;. 1 I 1 Fig.8 is view taken substantiallyon line 3-3 ofFig. 2, the inoperative position of the retaining elementbeing indicated by dotted lines;and

hammertype althoughit is obvious that the.

same may be embodied invarious othertypes of tools wherein a reciprocatory workingiimplement is employed. In'the construction shown the rock drill, genrally-designated 1, includes a'frontchuck housing 2 in which Fig. 4 is a detail sectionalview taken on 1930. SeriaITNoS 4540'8 thrre is rotilfiaml sleeve 3 threadedly connectedati lto a usual chuck 5. This chuck ;is provided ;with a* polygonal socket 6" whichwreceives the hexagonal shank? 7110f a usual rockdrill' steel 8. 11? ormed' in-; tegral with this drill :is a suitable abutment her'einin the form of a collar 9., 'The forward w'allof the chuckhousing is bored: at'lOito; permit the insertion of the;drill"shank within the chuck v Contained in the drill cylinder 11 is a usual hammer} pistonhaving a for- Wardly projecting striking bar 12 whichnis adaptedlto .transmitaimpact blowsjtothe ot the chuck" housing, and mounted within the b r t r ni 'aicyli id alb y 1 9i a" retainingielement 16;, The ,body}oi' this r8 m n ng em :inib fco p a om i libb 4 e y h nge about hiqhthere ni g' l n is adapt d nsw ghis etai in element is provided with a hook-shapedfstop piece; 17 having} an open sided 1 slot 18; which", whentl e retaining element is in its operative P sit n, mb a e th llste l body- Th $91? p e i r ce sed 19 endfth mi ler-t 12' I the drill steel, is adapted to project within'this recess when the'steel is in its extreme forward rk n po it nit i liith s b s en t e S p. pi i h ged "asito a r ng int and out of the path; of; the col-l drill steel. i

n hi mp bi iriictjiciiiiie trait? ingo e n s unt dqin elitima nve'n on the drill and this. improved :mouIi ting comprises a reduced cylindrical portion-herein i'nlthe form; of aistud 20projectingrear- WiLIdly-ffI'OIIlI and formed integral! with ithe sof 1y swingable stop piece adapted to move into tool, a retaining element having a transverseand out of the path of the abutment on the working implement and a cylindrical body fitting said offset bore to form a hinge about which the stop piece is swingable, means for yieldably mounting said cylindrical body of said retaining element in said offset bore including a stud secured to and projecting from said cylindrical portion rearwardly through an opening in the end wall of said offset casing and a cooperating spring encircling said stud, and means for locking said retaining element in its operative retaining position including a locking element carried on said stud and rotatable with said stud on swinging of said element about its hinge, said locking element being movable relative to said stud into and out of its locking position. i

5 In a tool of the character described, the

combination with a working element having an abutment and a front head having a longitudinal bore adapted to receive theshank of the working implement, of a casing on the side of the front head having a bore parallel with and offset from the axial line of the tool a retaining element having a transversely swingable stop piece adapted to move into and out of the path of the abutment on the working implement and a cylindrical body fitting said offset bore to form a hinge about which the stop piece is swingable, means for yieldably mounting said cylindrical body of said retaining element in said offset bore including a stud secured to and projecting from said cylindrical portion rearwardly through an opening in the end wall of said offset casing and a cooperating spring encircling said stud, and means for locking said retain in element in its 0 erativeretainin osition including a locking element slidably position including a locking element slidably mounted on said studnand connected tosaid stud to'rotate therewith uponswinging of a retaining element having a transversely swingable stop piece adapted to move into and out of the path of the abutment on the working implement and :a cylindrical body" fitting said ofl'setbore tojform a hinge about which the stop piece is swingable, means for yieldably mounting said cylindrical body of said retaining element in said offset bore including a stud secured to and projecting from said cylindrical portion rearwardly through an opening in the end wall of said offset casing anda cooperating springencircling said stud,- and means for locking said retaining element in its operative retaining position including a locking element having a polygonal opening therethrough and fitting a corresponding polygonal portion on said stud and having sliding movement relative to the latter, swinging of said retaining element about its pivot causing rotative movement of said i locking element. v

In testimony whereof I afiix my signature.

MERVIN CHESTER HUFFMAN.

mounted on said stud, said spring acting on said locking element for maintaining the latter in its operative locking position.

7 6. In a tool of the character described, the

combination with a workingelement having 7 an abutment and a front head having a longitudinal bore adapted to receive the shank of the working implement, of a casing on the side of the front head having a bore parallel with andoffset from the axial line of thetool,

a retaining element having a transversely swingable stop piece adapted to move into and out of the path of the abutment on the working implement and a cylindrical body fitting said ofi'set bore to form a hingeabout which the stop piece is swingable, means for 

